rust/tests/compile-fail/unit_cmp.rs

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#![feature(plugin)]
#![plugin(clippy)]
#![deny(unit_cmp)]
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#![allow(no_effect)]
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#[derive(PartialEq)]
pub struct ContainsUnit(()); // should be fine
fn main() {
// this is fine
if true == false {
}
// this warns
if { true; } == { false; } { //~ERROR ==-comparison of unit values detected. This will always be true
}
if { true; } > { false; } { //~ERROR >-comparison of unit values detected. This will always be false
}
}